About 100,000 people left Grant Park in very good spirits after a night of great music and great weather. For many, the fun continues on Sunday.

English folk rockers Mumford and Sons were one of the headline acts for night two of Lollapalooza.

For many, it capped a postcard perfect day along the lake.

"It's fantastic," said concertgoer Jeff Mikula. "The weather's beautiful. The music is fantastic. I'm having so much fun."

So far, there have been few problems reported at the three-day festival, though the fire department could not say how many people have needed medical care at the event because concert organizers have hired a private ambulance service.

"If anybody starts to kind of fall down drunk, they immediately take care of it," said concertgoer Tara Subeck.

Subeck was there with her three daughters, ages 5, 6 and 7.

"I'm not worried about them being exposed to something that they shouldn't be exposed to because it's just, it's a great eclectic crowd here," she said.

Lollapalooza wasn't the only busy spot along the lake.

More than 29,000 Bears fans turned out for the team's annual family fest at Soldier Field.

"I think they're going to be really good this year," said Bears fan Georgia Diamond. "And they're going to win."

For many of the Bears faithful, it was their first look at new players and new head coach Marc Trestman.

"I'm real excited about the offense kind of catching up to the defense. I think the offense could be a juggernaut," said Bears fan Mark Koos.

"I really want to see the players, like Matt Forte, because I like running backs. And I want to be a running back," said fan Aveyawn Madry.

Another 100,000 fans are expected in Grant Park on Sunday for one of the headline acts, The Cure.

City officials remind concert goers that outside food and drinks, including alcohol, are not allowed -- except for two sealed, plastic bottles of water. They're also warning people that counterfeit tickets are out there.

"We always push for public transportation. Stay west of the Michigan Avenue, that's probably the best advice I can give, to avoid as much of the traffic as you can," said Gary Schenkel, Chicago Office of Emergency Management.